py-brotherlabel

py-brotherlabel is a Python package to control Brother P-Touch label printers in raster printing mode. Intended to use on a Raspberry Pi board.

Compatible Printers

• PT-P900
• PT-P900W
• PT-P950NW

Usage

1. Connect the printer to the Raspberry Pi via USB cable and turn on the pritner.

2. Run command lsusb. The device ID will be listed along with the company name Brother.

Bus 001 Device 004: ID 04f9:2086 Brother Industries, Ltd

3. See example_usb.py. Pass the device ID to USBBackend constructor.

USB Device Permission

When pyusb shows the error usb.core.USBError: [Errno 13] Access denied (insufficient permissions), see https://www.raspberrypi.org/forums/viewtopic.php?t=186839

1. Create Rule

Example rule /etc/udev/rules.d/50-usb-perms.rules for PT-P900/P900W/P950NW:

SUBSYSTEM=="usb", ATTRS{idVendor}=="04f9", ATTRS{idProduct}=="2083", GROUP="plugdev", MODE="0666"
SUBSYSTEM=="usb", ATTRS{idVendor}=="04f9", ATTRS{idProduct}=="2085", GROUP="plugdev", MODE="0666"
SUBSYSTEM=="usb", ATTRS{idVendor}=="04f9", ATTRS{idProduct}=="2086", GROUP="plugdev", MODE="0666"

2. Reload Rule

sudo udevadm control --reload; sudo udevadm trigger

Reference

• Software Developer's Manual Raster Command Reference PT-P900/P900W/P950NW
  • English
  • Japanese